Explore topic-wise InterviewSolutions in .

This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.

3751.

What is a fuel cell?

Answer»

Solution :The galvanic cell in which the energy of combustion of fuels such as `H_(2)`, CO, `CH_(4)` etc is DIRECTLY converted into ELECTRICAL energy is CALLED the fuel cell.
Discussion
3752.

What is the difference between lowering of vapour pressure and relative lowering of vapour pressure?

Answer»

<P>

SOLUTION :LOWERING of V.P. `=p^(@)-p_(s).`
RELATIVE lowering of V.P. `=(p^(@)-p_(s))//p^(@).`
Discussion
3753.

Which of the statements about "Denaturation" given below are correct: Statements: (a) Denaturation of proteins causes loss of secondary and tertiary structures of the protein (b) Denaturation leads to the cnversation of double strand DNA into single strand Denaturation affects primary structure which gets distorted

Answer»

(a),(B) and (c )
(b) and (c )
(a) and (c )
(a) and (b)

Solution :When a protein in its native form, is subjected to physical change like change in temperature of chemical change like change in pH, the hydrogen bonds between base pairs are disturbed. Due to this, globules unfold and helix get uncoiled and protein loses its biological activity. This is called denaturationof protein. During DENATURATION `2^(@)` and `3^(@)` structures are DESTROYED but `1^(@)` structure remains INTACT.
Discussion
3754.

What is to be done to stop corrosion of iron metal ?

Answer»

It should be stored in saltless water
It should be stored in SALTED water
IRON should be attached with cathode
Iron should be kept as anode

Solution :Iron should be attached with cathode.
Discussion
3755.

Write the name and structure of one of the common initiators used in free radical addition polymerization.

Answer»

SOLUTION :BENZOYL PEROXIDE ,
Discussion
3756.

Which halide does not hydrolyse ?

Answer»

`SbCl_3`
`AsCl_3`
`PCl_3`
`NF_3`

ANSWER :D
Discussion
3757.

What is meant by crystal field splitting energy ? On the basis of crystal field theory, write the electronic configuration of d^(4) in terms of t_(2g) and e_(g) in an octahedral field when Delta_(0)gtP

Answer»

Solution :The five d-orbitals in a metal ion are degenerate (of equal energy). But when ligands approach the central metal ion, they experience repulsions. The d-orbitals are SPLIT into two groups consisting of three orbitals called `t_(2G)` orbitals and two orbitals called `e_(g)` orbitals. the `e_(g)` orbitals possess greater energy than`t_(2g)` orbitals. Till there are three electrons, they will occupy three `t_(2g)` orbitals singly. If there are 4 electrons in d-orbitals i.e., `d^(4)` configuration, two CASES ARISE.
If `Delta_0 GT P`, then the fourth electron will go to `t_(2g)` orbital, the electronic configuration will be `t_(2g)^(4)e_(g)^(0)` .
Discussion
3758.

Whichone of the followingis richin liver oil,carrot , mangoand papaya ?

Answer»

VITAMIN `B_(1)`
Vitamin C
Vitamin A
VITAMIND

Answer :C
Discussion
3759.

What is meant by crystal field splitting energy ? On the basis of crystal field theory, write the electronic configuration of d^(4) in terms of t_(2g) and e_(g) in an octahedral field when Delta_(0)ltP

Answer»

Solution :The five d-orbitals in a metal ion are degenerate (of equal energy). But when ligands approach the CENTRAL metal ion, they experience repulsions. The d-orbitals are split into two groups consisting of three orbitals CALLED `t_(2g)` orbitals and two orbitals called `e_(g)` orbitals. the `e_(g)` orbitals POSSESS greater energy than`t_(2g)` orbitals. Till there are three ELECTRONS, they will occupy three `t_(2g)` orbitals singly. If there are 4 electrons in d-orbitals i.e., `d^(4)` configuration, two cases ARISE.
If `Delta_(0)ltP` the fourth electron will go to `e_(g)` orbital, the electronic configuration will be `t_(2g)^(3)e_(g)^(1)`
Discussion
3760.

Which one of the following is formed when ethanoic acid is treated with HI and Red phosphorous?

Answer»

ETHANE
Ethene
Ethyne
Methane

SOLUTION :Ethane
Discussion
3761.

Write down the IUPAC name of the complex K_(4)[Fe(CN)_(6)]

Answer»

Solution :FIRSTLY, the +ve PART should be named followed by the negative part in which the name of the ligand should be given in ALPHABETICAL order with-the-metal-in the negative part ending in - ate (oxidation state in parethesis) Thus, the name is Potassiumhexacyano - C-ferrate (II)
HYPHEN C indicates that CN is bonded via carbon
Discussion
3762.

Which one of the following is true in electrolytic refining ?

Answer»

Impure METAL is made CATHODE
Impure metal is made anode
Impure metal is made cathode and pure metal as anode
Both ELECTRODES MUST be of pure metal

Solution :Impure metal is made the anode .
Discussion
3763.

Which of the following compounds would undergo the Cannizaro reaction ?

Answer»

ACETALDEHYDE
BENZALDEHYDE
Propionaldehyde
ANISOLE

Answer :B
Discussion
3764.

Whichof thefollowingcompoundgivenitrosomainewith HNO_(2) ?

Answer»

`1^(0)` AMINE
`2^(0)` amine
`3^(0)` amine
All of these

SOLUTION :Secondary aminereactswith NITROUS acidgivenitrosomine.
Discussion
3765.

Which characteristic is not correct about H_2SO_4

Answer»

REDUCING agent
Oxidising agent
Sulphonating agent
Highly viscous

Answer :A
Discussion
3766.

Whatis meant bythetermpyrometallurgy?

Answer»

SOLUTION :THEPROCESS ofextractingthemetalbyheatingthemetaloxidewithasuitablereducingagentiscalledpyrometallurgy.
Discussion
3767.

The silver glance ore on leaching with of :

Answer»

`Na_2(AG(CN)_2]`
`NA[Ag(CN)_2]`
`Na_2[Ag_2(CN)_2]`
`Na^+(Ag(CN)]^-`

ANSWER :B
Discussion
3768.

Which of the following processes is not accompanied by increase of entropy ?

Answer»

DISSOLUTION of `NH_(4)CL` in water
burning of ROCKET fuel
sublimation of dry ice
condensing steam

Answer :D
Discussion
3769.

Which of the following behaves as both Lewis and Bronsted base

Answer»

`BF_(3)`
`Cl^(-)`
CO
None of these

Solution :`UNDERSET("ACID")(HCl) RARR underset("Base")(Cl^(-))`
Discussion
3770.

Which one of the following complexes will have six isomers?

Answer»

`[CO(en)(NH_(3))_2CI_(2)]CI`
`[CR(H_(2)O)_(4)CI_(2)]CI`
 `[Co(oxalate)_(3)]^(3-)`
`[Co(en)_(2)Br]CI]`

ANSWER :D
Discussion
3771.

The temperature of the system increases during an:

Answer»

ISOTHERMAL expansion
Adiabtic compression
Adiabtic expansion
Isothermal compression

Answer :B
Discussion
3772.

Which one of the following is a tertiary alcohol?

Answer»

`CH_2= CHOH`
`CH_2CH-OVERSET(CH+_3)overset(|)(CH) -OH`
`CH_3-overset(CH_3) overset(|)(CH) - CH_2OH`
`CH_3-underset(CH_3) underset(|)overset(CH_3)overset(|)C-OH`

SOLUTION :`CH_3-underset(CH_3) underset(|)overset(CH_3)overset(|)C-OH`
Discussion
3773.

Which of following species do not give borax bead test ?

Answer»

`CO^(+3)`
`CV^(+3)`
`Ni^(2+)`
`AU^(+)`

ANSWER :D
Discussion
3774.

What is the weight of 1 mole of a solute, 0.132g of which in 29.7g of benzene, gave a freezing-point depression of 0.108^(@)C ? (K_(f) for benzene =5.12)

Answer»

SOLUTION :Molality `=(DeltaT_(f))/(K_(f))=(0.108)/(5.12)` ……….(EQN . 7)
and ALSO molality `=(0.32)/(M)XX(1000)/(29.7)m` (moles per `1000g`)
(`M=` mol.wt.or wt. of 1 mole of solute)
THUS,
`(0.132)/(M)xx(1000)/(29.7)=(0.108)/(5.12)`
`M=211.2g"mole"^(-1)`
Discussion
3775.

The wavelength of a moving body of mass 0.1 mg is 3.31 xx 10^(-29)m. Calculate its kinetic energy (h = 6.626 xx 10^(-34) Js) .

Answer»

Solution :`2 XX 10^(-3) J`
Discussion
3776.

What is meant by shape selective catalysis ?

Answer»
Discussion
3777.

Which of the following pair of isomers can not be separated by fractional crystallisation or fractional distillation:

Answer»

Maleic ACID and Fumaric and
(+)-TARTARIC acid and meso-tartaric acid
`CH_(3)-UNDERSET(overset(|)(NH_(2)))(C)H-COOH " and " H_(2)N-CH_(2)-CH_(2)-COOH`
(+)-lactic acid and (-) -lactic acid

Answer :D
Discussion
3778.

Which of the following complex compound exhibits geometrical isomerism?

Answer»

`[Fe(DMG)_(2)]`
`[Be(GLY)_(2)]`
`[PdClBr(gly)]`
`[Cd(NH_(3))Cl(gly)]`

Solution :`[Pd(Cl)(Br)(gly)]` is square PLANAR COMPLEX HENCE it can exhibits geometrical isomerism.
Discussion
3779.

underset("in basic medium")((D))+(NH_(4))_(2)SO_(4)rarrbrown ppt (G) Hence, compound(G) is

Answer»

`HgI_(2)`
`NH_(4)I`

`Hg(NH_(2))I`

ANSWER :C
Discussion
3780.

What are the various leaching processes?

Answer»

Solution :The VARIOUS LEACHING processes are CYANIDE leaching, ammonia leaching, ALKALI leaching and ACID leaching.
Discussion
3781.

The unit of specific conductance is:

Answer»

`"OHM"^(-1)`
`"ohm"^(-1) cm^(-1)`
`"ohm"^(-2) cm^(2) eq^(-1)`
`"ohm"^(-1) cm^(2)`

Answer :B
Discussion
3782.

Which of the following systems is not correctly characterised ?

Answer»

CUBIC : `a=b =C,alpha=beta=gamma=90^(@)`
TETRAGONAL: `a=b ne c,alpha=beta=gamma=90^(@)`
orthorhombic : `a ne b ne c,alpha=beta=gamma=90^(@)`
RHOMBOHEDRAL: `a=b ne c,alpha=beta=gamma=90^(@)`

Answer :D
Discussion
3783.

Which of the following statements is not correct for chemisorption and physisorption ?

Answer»

PHYSICAL ADSORPTION occurs at a low temperature and CHEMISORPTION occurs at all temperature
Magnitude of chemisorption DECREASES with rise in temperature while physisorption INCREASES with rise in temperature .
Chemisorption is irreversible and physisorption is reversible .
In physisorption activation energy is low while in chemisorption it is high.

Solution :Chemisorption increases and physisorption decreases with rise in temperature .
Discussion
3784.

Two moles of ammonia gas are introduced into a previously evacuated 1.0" dm"^(3) vessel in which it partially dissociates at high temperature. At equilibrium 1.0 mole of ammonia remains. The equilibrium constant K_(c) for the dissociation is

Answer»

`27//16 ("mole dm"^(-3))^(2)`
`27//8("mole dm"^(-3))^(2)`
`27//4("mole dm"^(-3))^(2)`
None of these

Answer :A
Discussion
3785.

Write two uses of ClO_(2).

Answer»

Solution :(i) `ClO_(2)` is a powerful oxidising AGENT and chlorinatingagent. Large quantities of `ClO_(2)` are used for bleaching WOOD pulp and cellulose and for purifying drinking WATER.
(ii) It is an EXCELLENT bleaching agent. Its bleaching power is about 30 times HIGHER than that of `Cl_(2)` and is used for bleaching flour to make white bread.
Discussion
3786.

Two solutions of glucose have osmotic pressures 1.5 and 2.5 atm. IL of first is mixed with 2L of second solution, the osmotic pressure of the resultant solution is

Answer»

2.5+1.5 ATM
2.5-1.5 atm
`(2.5+1.5)/2` atm
2.16 atm

ANSWER :D
Discussion
3787.

Which process is used for benefication of ores :

Answer»

PROCESS of REMOVAL of impurities
Process of heating ORE at high temperature
Extraction of METAL From ore
None

Answer :A
Discussion
3788.

Which is/are not the structure of 3-Methyl butan -2-ol.

Answer»




ANSWER :C::D
Discussion
3789.

Write the structures of the following compounds 1,4 Dibromobut-2-ene

Answer»

SOLUTION :`BrCH_2-CH=CH-CH_2Br`
Discussion
3790.

Two platinum electrodes were immersed in a solution of cupric sulphate and electric current passed through the solution. After some time it was found that the colour of copper sulphate disappeared with evolution of gas at the electrode. The colourless solution contains

Answer»

Sulphuric ACID
PLATINUM sulphate
COPPER sulphate
Copper hydroxide

Answer :A
Discussion
3791.

Which of the following is not the use of haloalkanes and haloarenes ?

Answer»

DRUGS
SOLVENT
ANAESTHESIA
CEMENT

ANSWER :D
Discussion
3792.

Writetheanem ofthemethodused forrefining ofthefollowing metals : (i) Titanium(ii) Germanium(iii) Copper

Answer»

SOLUTION :(i) Titanium - vanArkelsinceit makesavolatileiodideatlowere temperatureanddecomposesatahighertemperature.
(II) GERMANIUM- Zone refiningsincetheimpuritiespresentin Gearemoresolubleinthemoltenstatethaninthesolidstateofthe metal.
(iii) Copper-Electrolyticrefining.
Discussion
3793.

Which one of the following is an example for molecular crystals ?

Answer»

Diamond
Silica
Glass
NAPHTHALENE

Solution :Naphthalene
Discussion
3794.

Which of the following statements regarding conc. Sulphuric acid is not correct?

Answer»

It is REDUCED to `SO_2` on reaction with Cu.
It is a strong dehydrating agent.
It can be used to manufacture more volatile acids from their corresponding salts.
The ABSORPTION of `SO_2` is SULPHURIC ACID produces oleum.

Answer :D
Discussion
3795.

Whichof thefollowingis incorrectaboutbenzenediazoniumchloride ?

Answer»

These arecolourlesscrystallinesolid
Thesearereadilysoluble in WATER
It'saquenous solutionconductelectrcity
Theseareinsolutein water

ANSWER :D
Discussion
3796.

Which of the following is the industrial method of preparation of acetaldehyde?

Answer»

`CH_(3)CN underset(HCl)overset(SnCl_(2))to CH_(3)CN =NH overset(H_(3)O^(+))to`
`CH_(3)COCl+H_() underset(BaSO_(4))overset(PD)to CH_(3)CHO +HCl`
`CH_(2)=CH_(2)+H_(2)O overset(Pd^(2+))to CH_(3)CHO`
All of the above

Solution :`CH_(2)=CH_(2)+H_(2)O underset("Wacker's process")overset(Pd^(2+))to CH_(3)CHO+2H^(+)`
Discussion
3797.

Which of the following is not correctly matched with its uses?

Answer»

Methanol : As a solvent for PAINTS VARNISHES etc.
Ethanol : For denaturing spirit , in manufacture of formaldehyde
Ethers : To provide inert MEDIUM for chemical reactions , as anaesthetic
All are correctly matched

Answer :B
Discussion
3798.

Which of the following on oxidation can give a carboxylic acid in one step ?

Answer»

`1^(@)`ALCOHOL
`2^(@)`alcohol
`3^(@)`alcohol
Aldehyde

Answer :D
Discussion
3799.

The structure of DNA is

Answer»

Linear
Single helix
Double helix
Triple helix

Answer :C
Discussion
3800.

Write the IUPAC of the following compounds. (a)

Answer»


ANSWER :A::B::C::D
Discussion